公开(公告)号：US20230235636A1

公开(公告)日：2023-07-27

申请号：US18159192

申请日：2023-01-25

Applicant: SOUTHWEST PETROLEUM UNIVERSITY

Inventor： Hongtao LI ,  Gao LI ,  Jun JIANG ,  Wenhe XIA ,  Xu YANG

IPC: E21B21/08 ,  E21B33/06 ,  E21B21/10 ,  G05D16/18

CPC classification number: E21B21/08 ,  E21B33/06 ,  E21B21/106 ,  G05D16/18 ,  E21B21/065

Abstract: The present invention discloses an active intelligent wellbore pressure control system, which includes a ground multi-parameter online monitoring system (86), a rotary blowout preventer (1), a wellhead back pressure compensation manifold, an automatic plugging material filling device (62), a drilling device, an MPD intelligent control system (87), a remote monitoring and control system (88), and a high-precision hydraulic calculation system (105). The present invention provides a wellbore pressure control thought of “plugging and control integration”, improves the pressure resistance of a formation by circularly plugging while drilling, realizes active control of a wellbore pressure, effectively broadens a “drilling safety density window” of the formation, reduces the requirements on the pressure control precision of a wellbore pressure control device, solves the problem that a conventional MPD technology cannot deal with the situation that the “drilling safety density window” of the formation is extremely narrow or even zero, and expands the application range of the MIPD technology.